Channelized front ends for broadband analog & RF signal processing with merged LO synthesis

Abstract

Frequency domain processing of broadband signals that relies on decomposing the incident spectrum into multiple channels for digitization is an attractive alternative to timedomain processing. Channelized architectures can be utilized for several analog and RF signal processing tasks, such as data conversion, broadband radio receivers and spectrum analysis. A channelized front end based on cascaded image-reject stages which significantly simplifies the frequency synthesis requirement in such architectures is proposed in this paper. Analog non-idealities in such front ends are discussed.